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Tue, 11 Nov 2025 08:58:52 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id nFJ3Mcz6EmnGTwAAD6G6ig (envelope-from ); Tue, 11 Nov 2025 08:58:52 +0000 Message-ID: <0192016d-dd7c-4e60-b655-8ea7d2b8e0b3@suse.cz> Date: Tue, 11 Nov 2025 09:58:52 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] mm: Add vma_start_write_killable() Content-Language: en-US To: "Matthew Wilcox (Oracle)" , Andrew Morton Cc: linux-mm@kvack.org, Suren Baghdasaryan , Chris Li , "Liam R. Howlett" , Lorenzo Stoakes , Shakeel Butt , Jann Horn , Pedro Falcato References: <20251110203204.1454057-1-willy@infradead.org> <20251110203204.1454057-2-willy@infradead.org> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: <20251110203204.1454057-2-willy@infradead.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E9345180012 X-Rspamd-Server: rspam07 X-Stat-Signature: sbzeo9hza9f36517to73ny714xe315fh X-Rspam-User: X-HE-Tag: 1762851534-891891 X-HE-Meta: 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 lyKm+i+x fH2pBOUxWbWwtcjdiNXzp6BxDw0YdD/LT1BlpoZHq9qgMNpomXVX3hqHJlc801YmrSu3SHreez2y/SyysiP2gXEmxn7yIl5+7O2XQTkhPSGhj9BvOY7EwbZ5LtPRprXmyFcy657Q0COQSba0b8Oh8ecypws5vsRMg1lx+CcI0RDelqdZ66300YbGTHj3ePH91EKeZrGqU8ihUP4gH3wRNegRSZKrDuOsmrO6+c+KqRDXKpS5uVPxEskwrklrhwDT7Qyfp1wnwEmsVSCCB49V33a8+nJ0OYQPB+dvanGWWJc5RGJxYqbv8Wj+RSNRlMuPqs4hN+XnGUAvFyRRnEJg2W8g/Y2s0iG6vtv4a1E6M4dVoIa78xfrPdM94yE9LnrVNtEhjYRLnTP+98RLSNMKqwcj/f3rp4XLGOFwTF6omqx4XGgXRdEOfMwr1K2MXqpKyW7UFTDXqc3TIYBlh4doOAktx8A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 11/10/25 21:32, Matthew Wilcox (Oracle) wrote: > The vma can be held read-locked for a substantial period of time, eg if > memory allocation needs to go into reclaim. It's useful to be able to > send fatal signals to threads which are waiting for the write lock. > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Suren Baghdasaryan > Reviewed-by: Liam R. Howlett Reviewed-by: Vlastimil Babka